\" $NetBSD: gethostname.3,v 1.18 2015/09/03 04:05:38 jnemeth Exp $

\" $NetBSD: gethostname.3,v 1.18 2015/09/03 04:05:38 jnemeth Exp $
\"
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\" @(#)gethostname.3 8.1 (Berkeley) 6/4/93
\"
Dd September 2, 2015
Dt GETHOSTNAME 3
Os
Sh NAME
Nm gethostname ,
Nm sethostname
Nd get/set name of current host
Sh LIBRARY
Lb libc
Sh SYNOPSIS
In unistd.h
Ft int
Fn gethostname "char *name" "size_t namelen"
Ft int
Fn sethostname "const char *name" "size_t namelen"
Sh DESCRIPTION
Fn gethostname
returns the standard host name for the current machine, as
previously set by
Fn sethostname .
The parameter
Fa namelen
specifies the size of the
Fa name
array.
The returned name is null-terminated unless insufficient
space is provided.
Pp
Fn sethostname
sets the name of the host machine to be
Fa name ,
which has length
Fa namelen .
This call is restricted to the super-user and
is normally used only when the system is bootstrapped.
Sh RETURN VALUES
If the call succeeds a value of 0 is returned.
If the call fails, a value of \-1 is returned and an error code is
placed in the global location
Va errno .
Sh ERRORS
If the
Fn gethostname
or
Fn sethostname
functions fail,
they will set
Va errno
for any of the errors specified for the routine
Xr sysctl 3 .
Sh SEE ALSO
Xr gethostid 3 ,
Xr sysctl 3 ,
Xr sysctl 8
Sh STANDARDS
The
Fn gethostname
function conforms to
St -xpg4.2 .
Sh HISTORY
The
Nm
function call appeared in
Bx 4.2 .
Sh BUGS
Host names are limited to
Dv MAXHOSTNAMELEN
(from
Ao Pa sys/param.h Ac )
characters including null-termination, currently 256.